Update {virtual,override,final} to follow C++11 style.

content/shell/app/shell_crash_reporter_client.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_SHELL_APP_SHELL_CRASH_REPORTER_CLIENT_H_
 #define CONTENT_SHELL_APP_SHELL_CRASH_REPORTER_CLIENT_H_
 
 #include "base/compiler_specific.h"
 #include "components/crash/app/crash_reporter_client.h"
 
@@ skipping 22 matching lines @@
 
   base::FilePath GetReporterLogFilename() override;
 #endif
 
   // The location where minidump files should be written. Returns true if
   // |crash_dir| was set.
   bool GetCrashDumpLocation(base::FilePath* crash_dir) override;
 
 #if defined(OS_ANDROID)
   // Returns the descriptor key of the android minidump global descriptor.
-  virtual int GetAndroidMinidumpDescriptor() override;
+  int GetAndroidMinidumpDescriptor() override;
 #endif
 
   bool EnableBreakpadForProcess(const std::string& process_type) override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ShellCrashReporterClient);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_SHELL_APP_SHELL_CRASH_REPORTER_CLIENT_H_